<?php
/**
 * Tests for media content imports.
 *
 * @package WPContentSync
 */

namespace WPContentSync\Tests\Unit\Content;

use PHPUnit\Framework\TestCase;
use WPContentSync\Content\ContentRecordNormalizer;
use WPContentSync\Content\MediaContentHandler;
use WPContentSync\Logging\LoggerInterface;
use WPContentSync\Sync\SyncContext;
use WPContentSync\Url\MetadataUrlTransformer;
use WPContentSync\Url\UrlTransformer;

class MediaContentHandlerTest extends TestCase {
	/** @var array<int, array<string, mixed>> */
	private array $logs = array();

	protected function tearDown(): void {
		unset(
			$GLOBALS['wpcs_test_posts'],
			$GLOBALS['wpcs_test_next_post_id'],
			$GLOBALS['wpcs_test_post_meta'],
			$GLOBALS['wpcs_test_attachment_files'],
			$GLOBALS['wpcs_test_attachment_metadata']
		);

		$this->logs = array();

		parent::tearDown();
	}

	public function test_it_creates_attachment_records_without_downloading_files(): void {
		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord(),
			),
			$this->context( 'last_write_wins' )
		);

		self::assertTrue( $result->isSuccessful() );
		self::assertSame( 1, $result->created() );
		self::assertSame( 'Imported Image', get_post( 1 )['post_title'] );
		self::assertSame( 'attachment', get_post( 1 )['post_type'] );
		self::assertSame( 'image/jpeg', get_post( 1 )['post_mime_type'] );
		self::assertSame( 42, get_post_meta( 1, '_wpcs_source_id', true ) );
		self::assertSame( 'https://source.test', get_post_meta( 1, '_wpcs_source_site', true ) );
		self::assertSame( 'https://destination.test/uploads/image.jpg', get_post_meta( 1, '_wpcs_source_url', true ) );
		self::assertSame( array( false ), $GLOBALS['wpcs_test_attachment_files'] );
		self::assertSame( 'Skipped media binary download; importing attachment metadata only.', $this->logs[0]['message'] );
	}

	public function test_it_updates_attachment_metadata_with_last_write_wins(): void {
		$attachment_id = wp_insert_attachment(
			array(
				'post_title'     => 'Old Image',
				'post_mime_type' => 'image/jpeg',
			),
			false,
			0,
			true
		);
		update_post_meta( $attachment_id, '_wpcs_source_id', 42 );
		update_post_meta( $attachment_id, '_wpcs_source_site', 'https://source.test' );

		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord(
					array(
						'post_title' => 'Updated Image',
						'metadata'   => array(
							'width'  => 1200,
							'height' => 800,
						),
					)
				),
			),
			$this->context( 'last_write_wins' )
		);

		self::assertTrue( $result->isSuccessful() );
		self::assertSame( 1, $result->updated() );
		self::assertSame( 'Updated Image', get_post( $attachment_id )['post_title'] );
		self::assertSame(
			array(
				'width'  => 1200,
				'height' => 800,
			),
			wp_get_attachment_metadata( $attachment_id )
		);
	}

	public function test_it_does_not_match_existing_media_from_a_different_source_site(): void {
		$attachment_id = wp_insert_attachment(
			array(
				'post_title'     => 'Other Site Image',
				'post_mime_type' => 'image/jpeg',
			),
			false,
			0,
			true
		);
		update_post_meta( $attachment_id, '_wpcs_source_id', 42 );
		update_post_meta( $attachment_id, '_wpcs_source_site', 'https://other-source.test' );

		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord( array( 'post_title' => 'Current Site Image' ) ),
			),
			$this->context( 'last_write_wins' )
		);

		self::assertTrue( $result->isSuccessful() );
		self::assertSame( 1, $result->created() );
		self::assertSame( 'Other Site Image', get_post( $attachment_id )['post_title'] );
		self::assertSame( 'Current Site Image', get_post( 2 )['post_title'] );
	}

	public function test_it_rewrites_source_url_metadata_and_meta_urls(): void {
		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord(
					array(
						'metadata' => array(
							'file'  => 'https://source.test/uploads/image.jpg',
							'sizes' => array(
								'thumbnail' => array(
									'url' => 'https://source.test/uploads/image-150x150.jpg',
								),
							),
						),
						'meta'     => array(
							'_source_url' => 'https://source.test/uploads/image.jpg',
							'_json_links' => '{"url":"https://source.test/uploads/image.jpg"}',
						),
					)
				),
			),
			$this->context( 'last_write_wins' )
		);

		$metadata = wp_get_attachment_metadata( 1 );

		self::assertTrue( $result->isSuccessful() );
		self::assertSame( 'https://destination.test/uploads/image.jpg', get_post_meta( 1, '_wpcs_source_url', true ) );
		self::assertSame( 'https://destination.test/uploads/image.jpg', $metadata['file'] );
		self::assertSame( 'https://destination.test/uploads/image-150x150.jpg', $metadata['sizes']['thumbnail']['url'] );
		self::assertSame( 'https://destination.test/uploads/image.jpg', get_post_meta( 1, '_source_url', true ) );
		self::assertSame( '{"url":"https:\/\/destination.test\/uploads\/image.jpg"}', get_post_meta( 1, '_json_links', true ) );
	}

	public function test_it_skips_existing_media_with_manual_review_conflict(): void {
		$attachment_id = wp_insert_attachment(
			array(
				'post_title'     => 'Old Image',
				'post_mime_type' => 'image/jpeg',
			),
			false,
			0,
			true
		);
		update_post_meta( $attachment_id, '_wpcs_source_id', 42 );
		update_post_meta( $attachment_id, '_wpcs_source_site', 'https://source.test' );

		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord( array( 'post_title' => 'Updated Image' ) ),
			),
			$this->context( 'manual_review' )
		);

		self::assertTrue( $result->isSuccessful() );
		self::assertSame( 1, $result->skipped() );
		self::assertSame( 1, $result->conflicts() );
		self::assertSame( 'Old Image', get_post( $attachment_id )['post_title'] );
		self::assertSame( 'Skipped media import because manual review is required.', $this->logs[0]['message'] );
	}

	public function test_it_returns_failure_when_wordpress_rejects_attachment_save(): void {
		$result = $this->handler()->importRecords(
			array(
				$this->mediaRecord(
					array(
						'id'             => 0,
						'post_mime_type' => '',
					)
				),
			),
			$this->context( 'last_write_wins' )
		);

		self::assertFalse( $result->isSuccessful() );
		self::assertSame( array( 'Media import failed for source ID 0.' ), $result->errors() );
		self::assertSame( array(), get_post_meta( 0, '_wpcs_source_id', false ) );
	}

	private function handler(): MediaContentHandler {
		return new MediaContentHandler(
			new ContentRecordNormalizer(),
			new UrlTransformer(),
			new MetadataUrlTransformer( new UrlTransformer() ),
			$this->logger()
		);
	}

	private function context( string $conflict_strategy ): SyncContext {
		return SyncContext::forImport(
			array( 'site_url' => 'https://source.test' ),
			array( 'site_url' => 'https://destination.test' ),
			$conflict_strategy,
			'operation-1'
		);
	}

	/**
	 * @param array<string, mixed> $overrides Record overrides.
	 * @return array<string, mixed>
	 */
	private function mediaRecord( array $overrides = array() ): array {
		return array_merge(
			array(
				'id'             => 42,
				'post_title'     => 'Imported Image',
				'post_mime_type' => 'image/jpeg',
				'source_url'     => 'https://source.test/uploads/image.jpg',
				'metadata'       => array(),
				'meta'           => array(),
			),
			$overrides
		);
	}

	private function logger(): LoggerInterface {
		return new class( $this->logs ) implements LoggerInterface {
			/** @var array<int, array<string, mixed>> */
			private array $logs;

			/**
			 * @param array<int, array<string, mixed>> $logs Logs.
			 */
			public function __construct( array &$logs ) {
				$this->logs = &$logs;
			}

			public function error( string $message, array $context = array() ): void {
				$this->record( 'error', $message, $context );
			}

			public function warning( string $message, array $context = array() ): void {
				$this->record( 'warning', $message, $context );
			}

			public function info( string $message, array $context = array() ): void {
				$this->record( 'info', $message, $context );
			}

			public function debug( string $message, array $context = array() ): void {
				$this->record( 'debug', $message, $context );
			}

			/**
			 * @param array<string, mixed> $context Context.
			 */
			private function record( string $level, string $message, array $context ): void {
				$this->logs[] = array(
					'level'   => $level,
					'message' => $message,
					'context' => $context,
				);
			}
		};
	}
}